Environment-friendly fertilizer supplement stands up to temperature, water stresses
Worldwide, drought conditions, extreme temperatures, and high soil saline content all have negative effects on tomato crops. These natural processes reduce soil nutrient content and lifespan, result in reduced plant growth and yield, and ultimately translate to lower profits for tomato producers. As an alternative to unsustainable practices such as the use of synthetic fertilizers, producers are looking to environment-friendly soil ameliorants such as verimcompost leachate, an organic liquid produced from earthworm-digested material and casts that occur during the vermicomposting process.
"Earthworm casts present in vermicompost contain proteins, vitamins, and micro- and macro-elements such as nitrogen, phosphorous, potassium, calcium, and magnesium," explained Johannes Van Staden, lead author of a recent study published in HortScience. Van Staden and colleagues Mayashree Chinsamy and Manoj Kulkarni, from the Research Centre for Plant Growth and Development at the University of KwaZulu-Natal Pietermaritzburg, studied the effects of vermicompost-leachate (VCL) on tomato seedlings subjected to various temperatures and levels of water stress.
To investigate temperature stress, potted tomato seedlings were exposed to temperatures of 10, 15, 20, 25, and 30 °C and treated with and without vermicompost leachate (1:10 v/v). The experiments of water stress involved established tomato seedlings treated with and without VCL (1:10 v/v) treated with varying volumes (15, 30, and 45 mL) of half-strength nutrient solution. "Most of the morphological parameters of VCL-treated tomato seedlings were not only markedly enhanced at optimum temperature (25 °C), but also exhibited significant improvement under high temperature (30 °C)," the researchers wrote. "At lower temperatures (10, 15, and 20 °C), although VCL promoted several growth parameters of a tomato seedling, this improvement did not differ significantly with the respective controls."
The water stress experiments showed that photosynthetic pigments and compatible solute contents were significantly reduced in VCL-treated tomato seedlings at 15 mL. "Physiological parameters were reduced within the range of those found in more favorable conditions as observed for 30-mL supply of nutrient solution," the authors noted. The scientists said that the results of these water stress experiments clearly demonstrate the possibility of using less water resources to produce quality crops.
The results also showed that the constant supply of VCL improved morphological characters, including leaf area and shoot/root biomass, enabling VCL-treated tomato seedlings to perform better. The scientists concluded that vermicompost-leachate is a suitable soil amendment alternative that can significantly improve overall crop performance of tomato seedlings under abiotic stresses. "More importantly, VCL is organic and therefore can be used as an environment-friendly fertilizer supplement," they added.
The complete study and abstract are available on the ASHS HortScience electronic journal web site: http://hortsci.ashspublications.org/content/49/9/1183.abstract
Founded in 1903, the American Society for Horticultural Science (ASHS) is the largest organization dedicated to advancing all facets of horticultural research, education, and application.
More information at http://ashs.org
Michael W. Neff | EurekAlert!
New 3-D model predicts best planting practices for farmers
26.06.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign
Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
21.07.2017 | Earth Sciences
21.07.2017 | Power and Electrical Engineering
21.07.2017 | Physics and Astronomy